A DNS cluster is a set of DNS servers that share and synchronize DNS zone files. Having a nameserver cluster will help your domain to be online even if one of your DNS servers goes down.
cPanel is designed to host multiple domains in a single server. And because the IPv4 is a scarce resource, cPanel is designed in a way that it will rather use same IP for multiple domains. Such an IP is called a "shared IP address".
This article will help you to assign dedicated IP for your subdomains and addon domains. You will need it when you install SSL for such domains. Initially, this cannot be done via WHM.
Setting up a reseller can be sometimes confusing. Just giving the cPanel account reseller privileges may not help completely to keep it anonymous. Let's see what needs to be done to keep it completely anonymous.
The PureFTP daemon is easy to configure on a cPanel server using WHM or the PureFTPd configuration file. For those looking to set up FTP from command line (such as for automation purposes), you can use cPanel’s built-in template system to apply configuration options that will not be overwritten during cPanel updates.